Two phones, one match: the shot is the message, the receiver is the judge

VS A FRIEND on the mode screen (host a code, join a code), a ~110-line
RFC6455 relay in server.py that holds no game state, and src/net.js: each
phone plays itself near-side and the opponent's court is this one rotated
half a turn about the net. The phone a ball flies toward makes every call
on it; the striker's copy is picture. Six tests pin the rule from both
seats. No reconnect yet — a dropped radio is a card and a reload.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

src/config.js

@@ -655,6 +655,9 @@ export const MENU = [
   { mode: 'classic', diffs: true },
   { name: 'ZOMBIE TENNIS', sub: 'THE DEAD CLUB PLAYS YOU', art: 'mode_zombie', kids: ['zombie', 'cup'] },
   { mode: 'gore' },
+  // NETPLAY (prototype): a poster with no run mode of its own — its second step is HOST / JOIN,
+  // and either chip starts classic tennis against the other phone (beats.startNetVs + src/net.js)
+  { name: 'VS A FRIEND', sub: 'LIVE 1V1 · REAL TENNIS · TWO PHONES', art: 'mode_vs', net: true },
 ];
 
 // CLASSIC's difficulty. The first cut scaled only flub/quality-cap/speed and Oliver felt NOTHING —